Apple today released the Thunderbolt Firmware Update v1.2 via their Software Update utility and website for direct download. According to the company, this update provides stability fixes for Thunderbolt and Target Disk Mode. When your computer restarts a gray screen will appear with a status bar to indicate the progress of the update. The Thunderbolt Firmware Update v1.2 weighs in at 1.22 MB and requires Mac OS X 10.8.3 or later.